Author Topic: Rear gearbox mount (336)  (Read 918 times)

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Offline Bodzer

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Rear gearbox mount (336)
« on: Tuesday,February 06, 2018, 12:31:55 AM »
Hi all,

I have a new rear gearbox mount for my S2 with a 336 transmission. There are two sets of mounting holes. Which ones do I use?

Regards,

Peter

Offline Grumblebuns

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Re: Rear gearbox mount (336)
« Reply #1 on: Tuesday,February 06, 2018, 09:11:30 AM »
Could be either pair of holes. I examined three 336 gearboxes that I have and found that one has the bracket mounted using the #2 & #4 holes (S2). The other two are using the #1 & #3 holes (S2 and TC). Can't explain the differences. You need more data points. Maybe someone can explain the reasoning in the different configurations.

Offline jbcollier

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Re: Rear gearbox mount (336)
« Reply #2 on: Tuesday,February 06, 2018, 12:25:44 PM »
From the knowledgebase:

porsena@gmail.com
Date: Sat May 5, 2007 12:52 am
Subject: Re: Gearbox mounting pad

Thanks Steve. I did eventually find the right words to plug into the
KB. The answer appears to be to use the upper position. Those are the
holes I'd previously been using, but this was the second time I've had
the gearbox out. I marked the holes but didn't mark which way up the
pad went and then started to wonder.

If you put the pad into the frame upside-down it would make quite a
difference to the height of the rear of the gearbox, about 32 mm,
because the mounting studs are not in the centre of the bracket and
are also offset with respect to the midpoint of the four holes. It
seems to me that raising the back of the gearbox would pull the bottom
of the wheels in, decreasing negative camber. Is that right?

Bob

--- In lotuseuropa@yahoogroups.com, <Steve.Veris@...> wrote:
>
> Bob,
>
> Some mounts have two sets of holes. Which set to use is in the
> KnowledgeBase. My car's not in the garage or I'd run down and check for
> you. And, I can't remember which set is correct. However, if you
still use
> the stock speedo cable set-up, the mount can only [easily] be fit
one way.
> Other wise, the cable and/or angle drive interferes. HTH.
>
> Regards,
>
> Steve Veris
> 1970 S2 Europas
>
>
> -----Original Message-----
> From: lotuseuropa@yahoogroups.com
[mailto:lotuseuropa@yahoogroups.com] On
> Behalf Of sn2885
> Sent: Friday, May 04, 2007 10:55 PM
> To: lotuseuropa@yahoogroups.com
> Subject: [lotuseuropa] Gearbox mounting pad
>
>
> Having mostly re-installed my S2's gearbox, I'm looking at the rear
mounting
> pad, the one that fits into the channel on the back of the frame. The
> mounting pad is assymetric. I'm guessing the horizontal edges of the
rubber
> go at the top and the angled edges at the bottom. However, it also
looks as
> if the gearbox will bolt into the pad in one of two positions:
higher and
> lower. Is there a 'right' way to do this?

Offline Bodzer

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Re: Rear gearbox mount (336)
« Reply #3 on: Tuesday,February 06, 2018, 01:36:40 PM »
Thanks Joji and JB. Much appreciated. One way certainly fouls the speedo drive.